제출 #581013

#제출 시각아이디문제언어결과실행 시간메모리
581013pakapuRack (eJOI19_rack)C++14
40 / 100
27 ms11348 KiB
#include <iostream> #include <vector> #include <numeric> #include <algorithm> #include <queue> #include <bitset> #include <math.h> using namespace std; const int MOD = 1e9 + 7; int main() { ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); int n, k; cin >> n >> k; string s = bitset<10000000>(k - 1).to_string(); reverse(s.begin(), s.end()); long long pos = 1; for(int i = 0; i < n; i++) { if(s[i] == '1') { pos = (pos * 2) % MOD; } else { pos = (pos * 2 - 1) % MOD; } } cout << pos; return 0; }
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